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Well in this case, I basically meant posting to different VR subreddits, just because I heard that someone had quite a lot of luck in one of the VR related subreddits. Are you making sure that you're following the rules of the subreddits? Your post might get eaten by a spam filter if you're new and/or you don't follow the rules. I think it'd be worth looking into that more.

For the record, I'm definitely no expert about marketing. I'm pretty shy about sharing stuff, I'm just making games for fun. But I'll tell you what my understanding of marketing a game would be. First off,  from what I've heard, if you want people to play your game, marketing can't be an afterthought, it's generally as much effort as making your game. It isn't something that you're supposed to do only once your game is finished, it's supposed to be a gradual build up of anticipation while you're developing it. 

Some things you can do are:

• Find games/indie games (and in your case VR communities) and tell them about your game (facebook, reddit, post using VR related hashtags on twitter/tumblr, make nice gifs of gameplay, etc).
• Pay money for some advertising.
• Contact youtubers/media outlets and ask them to try it out. Try smaller content producers rather than just big names. If you're contacting someone to write an article, make sure you do most of the work for them (write about your game, include some cool screenshots, so that writing the article would be really easy for them).
• Keep a dev blog to garner interest slowly while you're making the game. Maybe make some tutorials if they would be of interest to others.
• Have a mailing list so that you can let  interested people know about new updates or releases of your game.

Good luck!